// @remove-file-on-eject
/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
'use strict'

const fs = require('fs')
const chalk = require('chalk')
const paths = require('./paths')

module.exports = (resolve, rootDir) => {
  // Use this instead of `paths.testsSetup` to avoid putting
  // an absolute filename into configuration after ejecting.
  const setupTestsFile = fs.existsSync(paths.testSetup) ? '<rootDir>/test/setupTests.js' : undefined

  // TODO: I don't know if it's safe or not to just use / as path separator
  // in Jest configs. We need help from somebody with Windows to determine this.
  const config = {
    collectCoverageFrom: ['src/**/*.{js,jsx,mjs}'],
    setupFiles: [resolve('lib/polyfills.js')],
    setupTestFrameworkScriptFile: setupTestsFile,
    testMatch: [
      '<rootDir>/test/**/__tests__/**/*.{js,jsx,mjs}',
      '<rootDir>/test/**/?(*.)(spec|test).{js,jsx,mjs}'
    ],
    testEnvironment: 'node',
    testURL: 'http://localhost',
    transform: {
      '^.+\\.(js|jsx|mjs)$': resolve('lib/jest/babelTransform.js'),
      '^.+\\.css$': resolve('lib/jest/cssTransform.js'),
      '^(?!.*\\.(js|jsx|mjs|css|json)$)': resolve('lib/jest/fileTransform.js')
    },
    transformIgnorePatterns: ['[/\\\\]node_modules[/\\\\].+\\.(js|jsx|mjs)$'],
    moduleFileExtensions: [
      'mjs',
      'js',
      'json',
      'jsx'
    ],
    globals: {
      'ts-jest': {
        tsConfigFile: paths.appTsTestConfig
      }
    }
  }
  if (rootDir) {
    config.rootDir = rootDir
  }
  const overrides = Object.assign({}, require(paths.appPackageJson).jest)
  const supportedKeys = [
    'collectCoverageFrom',
    'coverageReporters',
    'coverageThreshold',
    'snapshotSerializers'
  ]
  if (overrides) {
    supportedKeys.forEach(key => {
      if (overrides.hasOwnProperty(key)) {
        config[key] = overrides[key]
        delete overrides[key]
      }
    })
    const unsupportedKeys = Object.keys(overrides)
    if (unsupportedKeys.length) {
      console.error(
        chalk.red(
          'Out of the box, Create React App only supports overriding ' +
          'these Jest options:\n\n' +
          supportedKeys.map(key => chalk.bold('  \u2022 ' + key)).join('\n') +
          '.\n\n' +
          'These options in your package.json Jest configuration ' +
          'are not currently supported by Create React App:\n\n' +
          unsupportedKeys
            .map(key => chalk.bold('  \u2022 ' + key))
            .join('\n') +
          '\n\nIf you wish to override other Jest options, you need to ' +
          'eject from the default setup. You can do so by running ' +
          chalk.bold('npm run eject') +
          ' but remember that this is a one-way operation. ' +
          'You may also file an issue with Create React App to discuss ' +
          'supporting more options out of the box.\n'
        )
      )
      process.exit(1)
    }
  }
  return config
}
